Question

Describe the preparation method of sodium carbonate or wasng soda (na2co3. 10h2o)

Answer 1

it is prepared by reacting nacl with amonnia,co2 andh2o in salvae process

Answer 2

Hey Friend :-

Here is ur ans uh r looking for :-

• Formula of Washing soda is Na2CO3.10H2O

Washing Soda is Sodium Carbonate containing 10 molecules of water of crystallization.

i.e., Washing Soda is Sodium Carbonate Decahydrate.

• Preparation of Washing Soda.

Washing Soda is produced from Sodium Chloride.

Three Steps are :-

i ) Brine Which is a cold and concentrated Solution of NaCl is react with Ammonia and Carbon dioxide to obtain Sodium bicarbonate.

NaCl + NH3 + H2O + CO2 ----->
NaHCO3 + NH4Cl

NaHCO3 is in the form of precipitate.

ii ) Decomposition of NaHCO3

2NaHCO3 ----> Na2CO3 + CO2 + H2O

• NaHCO3 is decomposed by heating.

iii ) Recrystallization of Na2CO3

Na2CO3 + 10H2O ---> Na2CO3.10H2O

Hence we get Washing Soda.